This is just what they would be if comets had the genesis above supposed.
This is supposed to be legitimate in working out the periodicities of comets.
These comets, therefore, can make but one appearance in our skies.
It is thus we have been able to determine what the stars, comets, or nebul are made of.
And those other, sporadic members of our system, comets and meteors, what are they?
Also, there's the comets, which're called after the men who first find 'em.
The guessing the course of comets began then to be very much in vogue.
These three bands reveal the existence of hydrocarbon in comets.
This extreme tenuity of comets is moreover shown by their small weight.
We thought they was fixed stars; they was only comets—hot air.